We analyzed this package on Dec 5, 2018, and provided a score, details, and suggestions below.
Analysis was completed with status completed using:

Dart: 2.1.0

pana: 0.12.7

Platforms

Detected platforms: Flutter, web, other

No platform restriction found in primary library package:angel_migration/angel_migration.dart.

Health issues and suggestions

Document public APIs (-9.40 points)

47 out of 50 API elements (library, class, field or method) have no adequate dartdoc content. Good documentation improves code readability and discoverability through search.

Maintenance suggestions

Package is pre-release. (-5 points)

Pre-release versions should be used with caution, their API may change in breaking ways.

Maintain an example.

None of the files in your example/ directory matches a known example patterns. Common file name patterns include: main.dart, example.dart or you could also use angel_migration.dart. Packages with multiple examples should use example/readme.md.